4. Measures

Upgrade to macOS Mojave (10.14)

This issue is solved by upgrading macOS from High Sierra (10.13) to Mojave (10.14).

macOS High Sierra (10.13) setting change

When using macOS High Sierra (10.13) continually, this issue can be alleviated by changing the macOS settings for LCD font smoothing.
Uncheck "Use LCD font smoothing when available" under "General" settings.
Note: This method will change the system font settings, but may not affect font settings in all applications.